JP2006322105A - Apparatus for applying tension to selvedge warp yarn of selvedge apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress slackness of selvedge warp yarns by applying tension to the selvedge warp yarns while ensuring a weft insertion space of a shedding of the selvedge warp yarns in a selvedge apparatus of a shuttle-less loom equipped with a hollow rotating shaft and a pair of arms rotating integrally with the rotating shaft. <P>SOLUTION: The selvedge apparatus of the shuttle-less loom is equipped with the pair of arms provided in the rotating shaft so as to oppose sandwiching the axial line of the hollow rotating shaft and extending from the rotating shaft toward the outside and yarn guide parts provided in the tips of the arms, respectively. The selvedge apparatus performs a shedding motion of the one pair of selvedge warp yarns connecting out of the rotating shaft through the yarn guide parts to the cloth fell. In the selvedge apparatus, a pair of elastic members extending from the rotating shaft toward the outside and rotating integrally with the arms are installed and the elastic members contact the selvedge warp yarns connecting out of the rotating shaft to the yarn guide parts. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ear warp tension applying device in an ear braiding device disposed on at least one of left and right ends of a loom.

  The ear assembly device disposed on at least one of the left and right ends of the unwoven loom includes a device including a hollow rotating shaft and a pair of arms that rotate integrally with the rotating shaft. After passing through the rotating shaft, the pair of ear warps are connected to the front of the weave through a thread guide provided at the tip of the pair of arms. When the pair of arms rotate and the pair of yarn guides are positioned above and below the warp line, the ear warp is opened and weft insertion is performed. Further, after the pair of arms are rotated and closed, the pair of yarn guides are reversely positioned with respect to the warp line, and the pair of ear warps are beaten in a state where the weft is held at the end of the woven fabric. Thereby, the high quality woven fabric without a weft slack can be obtained (for example, refer patent document 1).

In the gazette of Patent Document 1, the pair of arms are elastically and flexibly configured in the axial direction of the rotation shaft, and the yarn guide is elastically applied to the ear warp in the direction in which the arm is urged. By contact, tension is applied from the arm to the ear warp via the thread guide. As a result, the tension of the ear warp is compensated, and it is possible to prevent the ear warp from being loosened along with the striking movement or its own opening movement. Therefore, in the woven fabric, the weft is sufficiently grasped by the pair of ear warps, so that weft looseness is further suppressed, and the quality is improved.
Japanese Patent No. 3248078

  As described above, the pair of arms are elastically and flexibly configured in the axial direction of the rotating shaft, and are easily elastically deformed by the ear warp, so that the thread guide at the tip is in the axial direction of the rotating shaft. Displace. Therefore, the shape of the ear warp opening at the time of maximum warp opening changes and is not maintained constant, and stable weft insertion cannot be realized. That is, when the yarn guide is displaced in the axial direction of the rotation shaft to the delivery side, the opening angle from the front of the weave becomes small. Therefore, the weft insertion space for the ear warp opening is not secured, and the weft insertion performance is impaired.

  In view of the above-described problems of the prior art, an object of the present invention is to provide an ear assembly device for a loom having a hollow rotary shaft and a pair of arms that rotate integrally with the rotary shaft. While securing a weft insertion space, tension is applied to the ear warp to suppress loosening of the ear warp.

  The present invention has been made in order to achieve the above object, and is provided with a pair of arms provided on the rotating shaft so as to face each other across the axis of the hollow rotating shaft and extending outward from the rotating shaft. And a pair of ear warp yarns connected to the front of the weave from the rotary shaft through the yarn guide portion and before the weaving. A pair of elastic members that extend outward from the arm and rotate integrally with the arm are provided, and the elastic members abut on an ear warp thread that is connected to the yarn guide portion from the rotation shaft.

  The ear warp tension applying device is provided with an ear warp yarn breakage detecting device including a sensor disposed on the delivery side from the arm, and the sensor detects a displacement of the elastic member due to the ear warp yarn breakage (claim). Item 2).

  The yarn breakage detecting device includes a proximity sensor, and detects either the advance of the elastic member to the detection region or the deviation from the detection region, and outputs an ear warp yarn breakage signal.

  Since the elastic member abuts on the ear warp thread connected from the rotation shaft to the yarn guide portion, the elastic member is biased to one of the sending side and the weaving side in the axial direction of the rotation shaft. Accordingly, the elastic member presses and bends the ear warp thread connected from the rotation shaft to the thread guide portion to the one side to apply tension to the ear warp thread, and is displaced to the one side when the ear warp thread is loosened. By increasing the bending of the ear warp, the looseness of the ear warp is eliminated and the tension of the ear warp is compensated. Since the ear warp is given a tension and the slack is suppressed, the weft can be sufficiently held at the time of punching, and a good woven fabric without the weft slack is woven. In addition, since the yarn guide portion is supported by the arm, the pair of ear warp threads connected from the yarn guide portion to the weave is maintained at the opening angle from the front of the weave, and a weft insertion space for the ear warp opening is secured. Weft insertion performance is maintained.

  As described above, the elastic member is in a state of being biased to either the delivery side or the front side of the weave, and applies tension to the ear warp thread connected from the rotating shaft to the yarn guide portion, and is normal. At this time, it is displaced in the axial direction of the rotating shaft in accordance with the ear warp tension. If a thread breakage occurs in the ear warp, and therefore it does not come into contact with the ear warp, it shifts to the one side beyond the normal displacement. According to the second aspect of the present invention, there is provided an ear warp thread breakage detecting device including a sensor, and the sensor detects a displacement accompanying the thread breakage of the ear warp thread of the elastic member, that is, a displacement exceeding a normal displacement. It is possible to reliably detect warp breakage.

  According to the third aspect, since the yarn break detecting device includes the proximity sensor, it is possible to easily detect the occurrence of the yarn break depending on whether or not the elastic member is in the detection area of the proximity sensor. More specifically, since the proximity sensor is provided closer to the delivery side than the arm, when the elastic member is urged toward the delivery side, the yarn advances into the detection area of the proximity sensor when a thread break occurs. The proximity sensor detects the advance of the elastic member to the detection region and generates a detection signal of the elastic member. Further, when the elastic member is urged to the front side of the weave, if the yarn breakage occurs, it deviates from the detection area of the proximity sensor. The proximity sensor detects a deviation from the detection region of the elastic member, and stops the detection signal of the elastic member that has occurred during normal operation. The yarn breakage detection device detects the occurrence of ear warp yarn breakage based on the presence or absence of a detection signal from the elastic member, and outputs an ear warp yarn breakage signal to a control device of the loom motor or the like in order to stop the loom.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1, 2, 3 and 4 show an ear assembly device 100 according to a first embodiment of the present invention. FIG. 1 is an overall view of the ear assembly device 100 and is a side view of the ear assembly device 100 viewed in the weaving width direction. FIG. 2 is an enlarged view of a main part of FIG. 1 and shows an ear warp tension applying device 110. FIG. 3 is a front view of the ear warp tension applying device 110 as viewed from the front 22, that is, as viewed from the right side in FIG. 2. FIG. 4 is a block diagram showing the control of the ear assembly device 100.

  The ear assembly device 100 is disposed on the left and right sides of the loaf loom, and the drawing shows the ear assembly device 100 disposed on the left side of the loom loom, that is, the weft insertion side.

  The ear assembly device 100 is formed in a U-shape and has a pair of opposing arms, and a table motor base 25 fixed to the loom frame 23 and an arm on the delivery side of the table motor base 25 via a bolt (not shown). A yarn feed table motor 24 that is fixed to the rotary shaft 24a, a boss portion 26a fixed to a rotary shaft 24a of the yarn feed table motor 24 via a bolt, and one end of the yarn feed table 26 that rotates integrally with the rotary shaft 24a. The yarn guide holder 34 is fixed to the boss portion 26a of the yarn feeding table 26 via the boss portion 26a, connected to the rotary shaft 24a via the boss portion 26a, and fixed to the other end with a pair of yarn guides 35 via bolts. The other end is supported by the arm on the front side of the table motor base 25 via a bearing 36 fitted to the outer peripheral surface of the yarn guide holder 34. A pair of guides having a yarn guide 33 at one end and the other end fixed to the support block 31 via a bolt. The holder 32, a pair of pegs 27 fixed to the yarn feeding table 26 and arranged symmetrically with the boss portion 26a interposed therebetween, and both ends thereof are supported by the peg 27, and the intermediate portion is arranged in the circumferential direction. The leaf spring 28 formed by a plurality of arc-shaped cross-section pieces, the opening motor 1 having a hollow rotating shaft 1a, and the opening motor 1 are fixed to the loom frame 23 via bolts and the opening motor 1 is fixed via bolts (not shown). An opening motor base 2, a yarn guide holder 3 having a yarn guide 10 at one end and fitted to the outer peripheral surface of the hollow rotary shaft 1 a, and a through hole formed on the outer peripheral surface of the yarn guide holder 3. A base portion 5a inserted through the small-diameter step portion, a pair of arm portions 5b extending from the base portion 5a in the radial direction of the rotating shaft 1a, and a pair of yarn guides provided at the tips of the pair of arm portions 5b, respectively. A rotating arm 5 having a holding portion 5c, a pair of yarn guides 7 fixed to the pair of yarn guide holding portions 5c, a nut 4 for fixing the rotating arm 5 to the yarn guide holder 3, and a bolt (not shown) The cover 13 is fixed to the opening motor base 2 and is interposed between the rotary arm 5 and a warp (not shown) so as to prevent the rotary arm 5 from interfering with the loose warp, and the axis of the rotary shaft 1a is sandwiched. It has a pair of ear warp restricting portions 12a that are separated from each other in the width direction and extend in the vertical direction, and is formed in a U shape, and both ends are fixed to the front end of the cover 13 on the weave side. It includes a rod 12 and a positioning sensor 41 that is fixed to the opening motor base 2 via a bolt and the detection portion projects into the shaft end accommodation hole 2a of the opening motor base 2.

  Further, the ear assembly device 100 is provided with a tension applying piece 6 as an elastic member. The tension applying piece 6 has a through hole and is inserted into the small diameter step portion of the yarn guide holder 3 together with the base portion 5a of the rotary arm 5. A base portion 6a, a pair of arm portions 6b extending from the base portion 6a in the radial direction of the rotating shaft 1a, and a pair of contact portions 6c formed at the tips of the pair of arm portions 6b. The tension applying piece 6 forms an ear warp tension applying device 110 in which the contact portion 6c is urged toward the delivery side in the axial direction of the rotary shaft 1a.

  The ear warp tension applying device 110 includes a thread break sensor 8 fixed to the opening motor base 2 via a bolt 9. The thread break sensor 8 and tension applying pieces 6 from the thread break sensor 8 are provided. A yarn breakage detection device 70 for the ear warp 20 including an ear assembly control device 71 for processing the detection signal is provided. The yarn breakage sensor 8 is exposed from the front side of the opening of the motor base 2 and is located on the delivery side of the rotary arm 5. More specifically, the yarn breakage sensor 8 is based on the space defined by the rotation of the rotary arm 5. Is also located on the sending side.

  Next, the opening movement of the ear assembly device 100 will be described. A pair of yarn supply packages 37 is mounted on the yarn supply table 26, and the bobbin tube of the yarn supply package 37 is supported by the peg 27 with a sufficient holding force via the leaf spring 28. The ear warp 20 unwound from the yarn supply package 37 is guided to a yarn guide 33 fixed to the untwisting shaft 30 via a support block 31 and a guide holder 32, and further passes through the yarn guide 35 of the yarn guide holder 34. Then, the yarn enters from the yarn guide 11 provided at the delivery side end of the hollow rotary shaft 1 a of the opening motor 1, passes through the rotary shaft 1 a, and reaches the yarn guide 10 of the yarn guide holder 3. After passing through the yarn guide 10, the pair of ear warps 20 are guided to the yarn guides 7 of the respective rotary arms 5 so as to face each other with a warp line interposed therebetween, and between the yarn guide 10 and the yarn guide 7, a tension applying piece 6 is provided. It abuts and is bent toward the delivery side. After passing through the yarn guide 7, the pair of ear warps 20 is guided between the pair of ear warp restriction portions 12 a of the rod 12. The ear warp 20 is restricted by the pair of ear warp restricting portions 12a in the weaving width direction, that is, in the horizontal direction, reaches the pre-weaving 22 and forms an ear tissue together with the beaten weft 19.

  The opening movement of the ear warp 20, that is, the rotation of the opening motor 1 is controlled based on the rotation angle of the loom main shaft 44, that is, the main shaft rotation angle, and the main shaft rotation angle is detected by the encoder EN connected to the loom motor 43. Then, it is input directly to the ear group controller 71 from the encoder EN or via the main controller 42 as in the present embodiment. The ear group controller 71 intermittently makes the opening motor 1 half-turn based on the main shaft rotation angle. In the weft insertion device 100 on the weft insertion side according to the present embodiment, the pair of yarn guides 7 are vertically positioned, that is, the ear warp opening is in the maximum opening state, and the opening motor 1 is rotated halfway at every main shaft rotation angle 260 °. Although it depends on the rotational speed of the loom, the half-rotation of the opening motor 1 is completed at a main shaft rotation angle of 320 ° after the ear warp 20 is closed at a main shaft rotation angle of 290 °. In the opposite weft insertion side ear assembly device 100, the half rotation of the opening motor 1 is started later than the weft insertion side ear assembly device 100. For example, the half rotation of the opening motor 1 is performed every 330 ° of the main shaft rotation angle. The rotation is started, and the half rotation of the opening motor 1 is completed at approximately the main shaft rotation angle of 30 °. Therefore, in the ear assembly device 100 on the weft insertion side of the present embodiment, during the period from the main shaft rotation angle of 320 ° to the main shaft rotation angle of 260 °, the rotary arm 5 stops while the pair of yarn guides 7 are positioned vertically. The ear warp opening is maintained at the maximum opening state. The rotating arm 5 has a positioning portion 5d protruding from the base portion 5a, and the positioning portion 5d is provided so as to advance into the shaft end accommodation hole 2a of the opening motor base 2 so as to face the detection portion of the positioning sensor 41. . In the initial setting of the phase of the opening motor 1, the positioning part 5d and the detection part of the positioning sensor 41 are accurately opposed to each other, so that the ear warp opening is maintained in the maximum opening state at the stop position.

  The yarn feed table motor 24 is controlled by the ear group controller 71 and continuously rotates in the same direction as the rotation direction of the opening motor 1 and rotates at the average rotation speed of the opening motor 1, that is, the opening motor 1 makes two half rotations. Rotate once between turns. The pair of ear warps 20 between the yarn guide 7 and the yarn guide 35 is twisted by the rotation of the pair of yarn guides 7, but the yarn supply table motor 24 rotates and the untwisting shaft 30 rotates. As a result, untwisting and twisting are eliminated.

  As shown in FIG. 3, the arm portion 5b of the rotary arm 5 and the arm portion 6b of the tension applying piece 6 are both on one side of the line connecting the yarn guide 10 and the yarn guide 7, in this embodiment. When viewed from the front, that is, when viewed from the front side of the weave, it is on the right side and extends in the radial direction of the rotary shaft 1a. The yarn guide holding portion 5c of the rotary arm 5 is formed in a U shape, and the yarn guide 7 having a guide space for the ear warp 20 is held. The yarn guide 7 is formed in a U-shape, and an outer portion of the guide space is opened so that the guide space communicates with the outside. The abutment portion 6c of the tension applying piece 6 is formed in a U-shape to form a guide wall of the ear warp yarn 20, and the inner portion in the radial direction of the rotating shaft 1a is bent toward the front of the weave 22; The ear warp 20 is avoided from being rubbed by the edge of the contact portion 6c. In the threading operation of the ear warp 20 through which the ear warp 20 is passed from the yarn guide 10 to the yarn guide 7, the operation of the finger is not hindered by the arm portion 5b and the arm portion 6b, and the yarn guide 7 Since it allows the guide space to be reached through the open part, it can be carried out easily and does not require time. In addition, since the slackness of the ear warp 20 is suppressed by the tension applying piece 6, the ear warp 20 does not escape from the guide space of the yarn guide 7 through the open portion.

  The tension applying piece 6 as an elastic member is formed of a metal elastic plate member that is more flexible than the rotating arm 5, specifically, thinner than the rotating arm 5, and in the axial direction of the rotating shaft 1 a. As shown in FIG. 3, the ear warp 20 connected from the yarn guide 10 to the yarn guide 7 is abutted from the front side of the weave and pressed to the output side as shown in FIG. When the tension is added and the tension is low, that is, when the slack is large, the bending becomes large, and the bending degree changes according to the tension. As a result, the pair of ear warp yarns 20 is restrained from being loosened and maintained in tension, and can sufficiently hold the weft yarns 19 at the time of punching, thereby obtaining a high-quality woven fabric 21 free from weft yarn slackening.

  When the tension applying piece 6 does not come into contact with the ear warp thread 20, that is, when the ear warp thread 20 is broken, the urging force is released, and the tension applying piece 6 has a shape shown by a one-dot chain line in FIG. That is, the contact portion 6c at the tip of the tension applying piece 6 is displaced more greatly than normal when the ear warp 20 is broken, and the opening motor 1 is located in the detection area of the yarn break sensor 8 which is a proximity sensor. When the rotary arm 5 stops, it advances.

  The yarn break sensor 8 outputs a detection signal of the tension applying piece 6, that is, a yarn break signal, to the ear group controller 71 as the tension applying piece 6 advances to the detection region. The ear group control device 71 reads the presence or absence of a thread break signal at a predetermined time of the weft insertion period, that is, the stop period of the opening motor 1, for example, at a main shaft rotation angle of 200 °, and the thread break signal is input. In this case, it is determined that the tension applying piece 6, which is an elastic member, has advanced into the detection region, that is, the yarn warp 20 has occurred, and the opening motor 1 and the yarn feeding table motor 24 are stopped and the main controller 42 is instructed to perform A cut occurrence signal is output. The main controller 42 stops the loom motor 43 based on the yarn break occurrence signal.

  In the present embodiment, the opening motor 1 is intermittently rotated. However, the opening motor 1 may be continuously rotated. In this case, the rotational speed is at the main shaft rotation angle where the pair of yarn guides 7 are positioned up and down, and in the vicinity thereof. Is preferably reduced. The ear group control device 71 has a predetermined main shaft rotation angle when the tension applying piece 6 passes through the detection area of the yarn break sensor 8 when the yarn breaks, that is, a predetermined main shaft rotation angle at which the pair of yarn guides 7 have reached the upper and lower sides. At the time, the presence or absence of a thread break signal is read.

  In this embodiment, the hollow rotating shaft forms the rotating shaft 1a of the rotor of the opening motor 1, but is supported by the loom frame 23, and this hollow rotating shaft is connected to the hollow rotating shaft via a motion transmission mechanism such as a belt or a gear. You may drive with the motor of the rotating shaft different from a rotating shaft.

  In this embodiment, only one thread break sensor 8 is provided, and the thread break is detected when the ear warp 20 is positioned on the upper warp. However, a pair of ear warps may be provided with the rotary shaft 1a interposed therebetween. Thread breakage when 20 is positioned on the lower warp is also detected, and the loom is stopped quickly.

  In the present embodiment, the yarn break sensor 8 is fixed to the loom frame 23 via the opening motor base 2, but may be fixed to the loom frame 23 via a member different from the opening motor base 2. .

  In this embodiment, the pair of yarn supply packages 37 is rotated by the yarn supply table motor 24, and the twist of the pair of ear warps 20 due to the rotation of the yarn guide 7 is eliminated. It may be rotated by the loom motor 43 via the mechanism.

  In the present embodiment, the pair of yarn supplying packages 37 is rotated by the yarn supplying table motor 24, but may be fixed. In this case, the opening motor 1 is rotated in the opposite direction every time a predetermined number of rotations is reached in order to eliminate twisting of the pair of ear warps 20 due to the rotation of the yarn guide 7.

  In this embodiment, the yarn breakage sensor 8 is provided, and the yarn breakage of the ear warp thread 20 is detected based on the displacement of the tension applying piece 6. However, the tension applying piece 6 only applies tension to the ear warp thread 20. There may be. The looseness of the ear warp 20 is suppressed, and a good woven fabric without the weft looseness is obtained.

  Next, an ear assembly device 120 according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a side view of the ear assembly device 120 viewed in the weaving width direction, similar to FIG. 2 of the ear assembly device 100 of the first embodiment.

  The ear assembly device 120 includes a tension applying piece 56 as an elastic member, and an ear warp tension applying device 130 is formed by the tension applying piece 56. The tension applying piece 56 has a through hole and a base portion 56a inserted into the small diameter step portion of the yarn guide holder 3 together with the base portion 5a of the rotary arm 5, and extends from the base portion 56a in the radial direction of the rotary shaft 1a. It has a pair of arm part 56b and a pair of contact part 56c each formed in the front-end | tip of a pair of arm part 56b, and the contact part 56c is urged | biased by the weaving front side in the axial direction of the rotating shaft 1a.

  The ear warp tension applying device 130 includes a thread break sensor 8 that is fixed to the opening motor base 2 through a bolt 9. A thread breakage detection device 70 is formed. The yarn breakage sensor 8 has a detection unit protruding from the front side of the opening motor base 2 and located on the delivery side of the rotary arm 5, in detail, more than a space defined by the rotation of the rotary arm 5. Located on the sending side.

  The tension applying piece 56 is in contact with the ear warp 20 connected from the yarn guide 10 to the yarn guide 7 from the delivery side, and presses the ear warp 20 to bend toward the front side of the weave. When the tension applying piece 56 does not come into contact with the ear warp yarn 20, that is, when the ear warp yarn 20 is broken, the urging force is released and becomes a shape shown by a one-dot chain line. Therefore, the displacement does not deviate from the detection region of the yarn breakage sensor 8 which is a proximity sensor, and does not advance into the detection region when the rotary arm 5 stops with the rotation of the opening motor 1.

  The yarn break sensor 8 outputs the detection signal of the tension applying piece 6 that was output during the intermittent stop period of the opening motor 1 in the normal state to the ear control unit 71 in accordance with the deviation from the detection area of the tension applying piece 6. No longer. The ear group control device 71 reads the presence / absence of the detection signal of the tension applying piece 6 at a predetermined time during the intermittent stop period of the opening motor 1, and when the yarn break signal is not input, the tension applying which is an elastic member The deviation from the detection area of the piece 6, that is, the occurrence of yarn breakage of the ear warp yarn 20, is determined, the opening motor 1 and the yarn feeding table motor 24 are stopped, and a yarn breakage occurrence signal is output to the main controller 42. The main controller 42 stops the loom motor 43 based on the yarn break signal.

  Next, an ear assembly device 140 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a side view of the ear assembly device 140 viewed in the weaving width direction, similar to FIG. 2 of the ear assembly device 100 of the first embodiment.

  The ear assembly device 140 includes a pair of tension applying pieces 66 as elastic members, and an ear warp tension applying device 150 is formed. The tension applying piece 66 includes a base portion 66a fixed to the arm portion 5b of the rotating arm 5 via a bolt 67, an arm portion 66b extending from the base portion 66a to the delivery side in the axial direction of the rotating shaft 1a, A contact portion 66c formed on the portion 66b, and the contact portion 66c is urged toward the delivery side in the axial direction of the rotating shaft 1a.

  The ear warp tension applying device 150 includes a thread break sensor 8 that is fixed to the opening motor base 2 via a bolt 9. A thread breakage detection device 70 is formed. The yarn breakage sensor 8 has a detection unit protruding from the front side of the opening motor base 2 and located on the delivery side of the rotary arm 5, in detail, more than a space defined by the rotation of the rotary arm 5. Located on the sending side.

  The tension applying piece 66 is in contact with the ear warp 20 connected from the yarn guide 10 to the yarn guide 7 from the front side of the weave, and presses the ear warp 20 to bend toward the delivery side. When the tension applying piece 56 does not come into contact with the ear warp yarn 20, that is, when the ear warp yarn 20 is broken, the urging force is released to have a shape shown by a one-dot chain line, and the contact portion 66c of the tension applying piece 66 is displaced. Then, as the opening motor 1 rotates, the thread breaks the sensor 8 as a proximity sensor, and advances when the rotary arm 5 stops. The yarn breakage detection device 70 determines that a yarn breakage has occurred as in the first embodiment, and stops the loom.

  In any embodiment, the yarn break sensor 8 of the yarn break detection device 70 is a proximity sensor, but may be a distance sensor. A setter is provided in the thread breakage detecting device 70, a threshold value is set, and the thread breakage sensor 8 determines the distance from the tension applying piece 6 at a predetermined spindle rotation angle when the pair of yarn guides 7 have moved up and down. Measure and output to the ear group controller 71. The ear group control device 71 includes a comparator, and when the measured value of the yarn breakage sensor 8 is biased toward the delivery side, the tension applying piece 6 is attached to the front side of the weave when the tension applying piece 6 is below the threshold value. When the force is applied, it is determined that the ear warp 20 is broken when it is equal to or greater than the threshold value, a yarn break signal is output, and the loom is stopped.

  The present invention is not limited to any of the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is the side view which showed the whole figure of the ear assembly apparatus 100 of the 1st Example of this invention, and looked at the weaving width direction. It is a principal part enlarged view of FIG. 1, and shows the ear warp tension | tensile_strength providing apparatus 110 of a 1st Example. 1 is a front view of an ear warp tension applying device 110 according to a first embodiment as viewed from before weaving. 3 is a block diagram showing control of the ear assembly device 100. FIG. An ear warp tension applying device 130 according to a second embodiment is shown. An ear warp tension applying device 150 according to a third embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening motor 1a Rotating shaft 2 Opening motor base 2a Shaft end accommodation hole 3 Yarn guide holder 4 Nut 5 Rotating arm 5a Base part 5b Arm part 5c Yarn guide holding part 5d Positioning part 6 Tension applying piece 6a Base part 6b Arm part 6c Contact portion 7 Yarn guide 8 Thread breakage sensor 9 Bolt 10 Yarn guide 11 Yarn guide 12 Rod 12a Ear warp regulating portion 13 Cover 19 Weft 20 Ear warp 21 Weaving fabric 22 Weaving 23 Weaving machine frame 24 Feeding table motor 24a Rotating shaft 25 Table Motor base 26 Yarn supply table 26a Boss portion 27 Peg 28 Plate spring 30 Untwisting shaft 31 Support block 32 Guide holder 33 Yarn guide 34 Yarn guide holder 35 Yarn guide 36 Bearing 37 Yarn supply package 41 Positioning sensor 42 Main controller 43 Loom motor 44 Loom main shaft 56 Tension applying piece 56a Base portion 56b Arm portion 56c Abutting portion 66 Tension applying piece 66a Base portion 66b Arm portion 66c Abutting portion 67 Bolt 70 Thread breakage detecting device 71 Ear assembly control device 100 Ear assembly device 110 Ear warp Tension applying device 120 Ear assembly device 130 Ear warp tension applying device 140 Ear assembly device 150 Ear warp tension applying device EN Encoder

Claims (3)

A pair of arms provided on the rotating shaft so as to face each other across the axis of the hollow rotating shaft, extending outward from the rotating shaft, and a yarn guide portion provided at the tip of the arm, In the ear assembly device of a braided loom that performs the opening movement of a pair of ear warp yarns connected from the rotating shaft through the yarn guide part to the weave,
A pair of elastic members extending outward from the rotating shaft and rotating integrally with the arm are provided, and the elastic members are in contact with the ear warp threads connected to the yarn guide portion from the rotating shaft. Ear warp tension applying device for loom ear assembly device.   The ear warp thread breakage detecting device including a sensor disposed on the delivery side from the arm is provided, and the sensor detects a displacement of the elastic member accompanying the thread breakage of the ear warp thread. Ear warp tension applying device of the ear braiding device of the unwoven loom.   The yarn breakage detecting device includes a proximity sensor, and outputs either a thread breakage signal of an ear warp thread by detecting either advancement of the elastic member to a detection region or deviation from the detection region. 3. An ear warp tension applying device for an ear braiding device of a plain loom according to 2.

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